Which principle of unit training emphasizes training leaders as the primary instructors?

The principle that emphasizes training leaders as the primary instructors is rooted in the idea that effective leadership is crucial for successful unit training. When commanders take on the responsibility for training, they not only set the standard but also engage directly in the development of their personnel's skills and competencies. This involvement allows commanders to impart their experience and knowledge, ensuring that the training aligns with operational needs and organizational goals.

By being actively involved, leaders foster a culture of continuous improvement and set examples for their subordinates. This principle underscores the value of leadership in the training environment, as it prepares the next generation of leaders to effectively handle tasks and responsibilities in real-world scenarios. This concept also helps to ensure that training is relevant, effective, and adheres to established standards, which ultimately leads to better operational readiness and unit cohesion.

Other choices do not emphasize the role of leaders as instructors. While aspects like training while operating or developing operational adaptability are important, they focus on different components of the training process rather than the direct responsibility of military leaders in instructional roles.